It's impossible to get 45°F air out of the center dash vents with a low-side reading of 100 PSI. Are you sure your Manifold Gauge Set is registering the correct low-side pressure? For reference, your car's A/C specifications are as follows: 19 ounces net weight of R-134a, and 5.5 fluid ounces of PAG...

... the car only has 65,000mi on it, I was just thinking maybe the compressor got hurt from heavily overcharging it a few times, it worked fine prior to the Interchiller installation. It's possible that the control valve or a reed valve sustained damage from the overcharge. I was doing some researc...

What connected to those two nipples, and how did they attach? Might the fittings on the condenser side of the R/D be the peanut style that attach with individual offset bolts, or studs and nuts? Regardless, instead of trying to figure out this mystery, I would simply purchase a new condenser and R/D...

I did the usual checking for enough refrigerant charge and monitoring if the clutch was engaged/staying engaged and all is ok in that department. Wondering how you checked for the proper refrigerant amount, which can't be "gauged" by pressures. For reference, the A/C specifications that I...

Could a low charge cause a frosty POA valve? It's possible. However, if the A/C system hasn't run for a few years—and given the age of the car—testing the POA valve's pressure setting is advisable. Should you decide to convert from R-12 to R-134a refrigerant, the POA valve will also need to be re-c...

What I am seeing is a consistently low high side pressure reading, from when the car is off to when its running, would that point to the compressor or blockage or both or something else? The cabin AC does work better when the temperature is cooler out like tonight it is 67deg right now and it got c...

From the appearance of the low-side service port adapter on the POA valve, this '68 Buick probably still has R-12, although that's a guess. I can't see the service port adapter on the high side because it isn't shown. I know you said that there are no signs of a conversion, but double check whether ...

I've been thinking about your post since you wrote it on Saturday, and I have several questions to help clear-up some things. Hello all, I need help diagnosing what I have going on with the AC system on my car. What is the model year, make, model, and engine type/size of your car, and is this a USA-...

A little bit of trivia and brief diversion, if I may: Many years ago during the 1950's, when people used alcohol (not the drinkable kind) in their cooling systems instead of ethylene glycol because the former was a cheaper alternative antifreeze, thermostats had to be changed from the then-standard ...

It's a proprietary database from which I gleaned the 8.0 fluid ounces of PAG-46 for your truck. But AllData and Mitchell's reportedly have the same information. Last time I looked, you can purchase a short-term subscription to either one for just about any vehicle. They are the same factory sources ...